Laserfiche WebLink
<br />Effectiveness <br />Well-designed dikes <br />individual homes or <br />diverting flood flows. <br />failure of a dike may cause greater damage than <br />if no dike existed. <br />Effective only ~here they are part of an <br />integrated plan for the entire area. They must <br />be tied into conveyance channels to prevent <br />flooding of other areas by diverted flows. <br />Unarmored dikes are of little value, <br />failure is likely during flood events, <br />in the local model tests (Part II, <br />5 . 6 ) . <br /> <br />can successfuly protect <br />blocks of homes by <br /> <br />since <br />as shown <br /> <br />Section <br /> <br />Public Acceptance <br />4 Acceptance is likely to be good due to low <br />costs and a high level of perceived protection. <br />Dikes generate more public confidence than they <br />deserve in many cases, since design of local <br />dikes is often inadequate to withstand flood <br />events. <br />Costs are paid by developers or homeo~ners. <br /> <br />Required Maintenance <br />Inspection and repair. including removal of <br />sediment. after each flood. <br /> <br />Street Desion and Orientation <br /> <br />Susceptibility <br />Subject to scour due to extremely high <br />velocities and sediment deposition. <br />Streets must be substantially depressed below <br />ground surface and the side-walls armored to <br /> <br />82 <br />